Push-and-pull device for computer keyboard tray

Abstract

The utility model discloses a computer keyboard tray push-and-pull device which comprises a computer desk and a keyboard tray which is arranged below the computer desk and can linearly move back and forth with the computer desk, and further comprises a push-and-pull device and a U-shaped installation support, the push-and-pull device comprises a sliding rail assembly and a sliding groove, the sliding rail assembly is fixedly connected with a computer desk panel through the U-shaped installation support, and the sliding groove is fixedly connected with the computer desk panel. The bottom wall of the sliding groove is fixedly connected with the left side face and the right side face of the keyboard tray, and the sliding groove is inserted into the sliding rail assembly and connected with the sliding rail assembly in a front-back linear moving mode. The U-shaped installation support comprises a fixing plate, a U-shaped groove plate and a pressing screw rod. By arranging the U-shaped mounting bracket, the bottom mounting mode of the keyboard tray is changed into a left and right side mounting mode, so that the stability is improved, the keyboard tray can be conveniently mounted and dismounted, a common office table is changed into a computer table without drilling into the lower part of a table panel, the labor intensity of an operator is low, and the U-shaped mounting bracket is simple in structure and convenient to process; the cost is low.

Description

A computer keyboard tray push-pull device Technical Field

[0001] This utility model relates to the field of computer desk technology, and in particular to a computer keyboard tray push-pull device. Background Technology

[0002] Currently, computer keyboard trays typically use push-pull slide rails installed on the bottom left and right sides of the keyboard tray. When the keyboard tray is pulled out for operation, the side closest to the keyboard tray tends to tilt downwards, resulting in poor stability. Over time, the push-pull slide rails may also deform or become stuck.

[0003] Current sliding rail installation methods typically involve fixing a bent mounting plate to the bottom of the computer desktop with bolts, which is cumbersome to install and disassemble. Sometimes, people need to convert existing ordinary office desks into computer desks. If existing sliding rails are used for modification, the installer must crawl under the desktop to install them, which is inconvenient, inefficient, and labor-intensive. Summary of the Invention

[0004] To address the problems of existing keyboard tray sliding rails, which are typically installed on the bottom left and right sides of the keyboard tray, causing the front to tilt and resulting in poor stability; and the difficulty of installation and disassembly when bolted to the bottom surface of the desk panel, this invention provides an easy-to-install and disassemble computer keyboard tray sliding device. This invention uses a U-shaped mounting bracket to change the bottom mounting method of the keyboard tray to a left and right side mounting method. When the keyboard tray is pulled out for work, it will not tilt downwards, improving stability. Furthermore, the U-shaped mounting bracket directly snaps onto the front of the desktop panel, making installation and disassembly very convenient. When converting an ordinary desk into a computer desk, there is no need to crawl under the desktop panel for installation, making operation convenient.

[0005] To achieve the above objectives, this utility model provides a computer keyboard tray push-pull device, including a computer desk and a keyboard tray located under the computer desk and forming a linearly movable back-and-forth motion with the computer desk. It also includes a push-pull device and a U-shaped mounting bracket. Two push-pull devices and two U-shaped mounting brackets are provided, respectively located on the left and right sides of the keyboard tray. The push-pull device includes a slide rail assembly and a slide groove. The slide rail assembly is fixedly connected to the computer desktop via the U-shaped mounting bracket. The bottom wall of the slide groove is fixedly connected to the left and right sides of the keyboard tray. The slide groove is inserted into the slide rail assembly, forming a linearly movable back-and-forth connection with the slide rail assembly, thereby allowing the computer keyboard placed in the keyboard tray to be pulled out for use at any time, or pushed back under the computer desktop for concealment at any time.

[0006] The U-shaped mounting bracket includes a fixing plate, a U-shaped groove plate, and a clamping screw. The fixing plate is placed vertically, and one side of the fixing plate is fixedly connected to the bottom surface of the slide rail assembly. The U-shaped groove plate is fixedly connected to the upper front side of the fixing plate away from the slide rail assembly. The groove of the U-shaped groove plate engages with the front side of the computer desktop panel. The clamping screw passes through the lower side wall of the U-shaped groove plate and is threaded to the lower side wall. The upper end of the clamping screw is provided with a pressure head, and the lower end is provided with a pendulum handwheel. Rotating the pendulum handwheel can clamp and fix the desktop panel by the upper surface of the pressure head against the upper side wall of the U-shaped groove plate.

[0007] Furthermore, the upper side of the U-shaped channel plate is integrally formed by sheet metal bending and is made of metal steel.

[0008] Furthermore, the slide rail assembly includes a fixed groove rail, a ball bearing strip, a movable groove rail, and a ball bearing groove plate. The grooves of the fixed groove rail, the movable groove rail, and the ball bearing groove plate have the same opening direction. The movable groove rail is engaged within the fixed groove rail. The inner sidewall of the fixed groove rail has a through first arc-shaped groove in the middle. The outer sidewall of the movable groove rail has a second arc-shaped groove at a position corresponding to the first arc-shaped groove. The ball bearing strip is embedded with multiple evenly distributed steel balls. The ball bearing strip is inserted between the inner sidewall of the fixed groove rail and the outer sidewall of the movable groove rail. The two sides of the steel balls are tangent to the first arc-shaped groove and the second arc-shaped groove, respectively, so that the movable groove rail moves smoothly back and forth in a straight line within the fixed groove rail, reducing friction.

[0009] The ball bearing groove plate is fitted into the movable groove rail. Several evenly distributed steel balls are embedded on the left and right side walls of the ball bearing groove plate. The upper end of the inner side wall of the movable groove rail is provided with a through third arc-shaped groove, and the lower end of the outer side wall of the groove is provided with a through fourth arc-shaped groove. The third arc-shaped groove and the fourth arc-shaped groove are tangent to the left and right sides of the steel balls, respectively, so that the groove moves smoothly back and forth in a straight line within the movable groove rail, reducing friction.

[0010] Furthermore, the bottom wall of the movable groove is provided with a first boss that is formed by upward stamping and extends through the front and back, and the bottom wall of the ball groove is provided with a second boss that is formed by upward stamping and extends through the front and back. The second boss is sleeved with the first boss, which guides the linear movement of the ball groove in the movable groove.

[0011] Furthermore, the bottom wall of the rear end of the fixed groove is provided with an opening groove, and the front side of the opening groove is provided with an upward first bent edge. A first elastic plastic sleeve is fitted on the first bent edge for limiting the linear backward movement of the movable groove.

[0012] The fixed groove has two rectangular grooves on the left and right sides of the bottom wall of the front end groove. The side of the rectangular groove closest to the corresponding side wall has a second bent edge that bends upward. The second bent edge is used to limit the forward linear movement of the ball strip, and also to limit the forward linear movement of the movable groove within the fixed groove.

[0013] Furthermore, the front end of the movable track is provided with a plastic retaining plate. The upper ends of the left and right side walls of the plastic retaining plate are provided with outer arc surfaces that cooperate with and engage with the third arc-shaped groove at the upper end of the movable track. An upwardly extending flange is provided on the inner bottom surface of one side. A retaining groove is formed between the flange and the corresponding side wall. The corresponding side wall of the slide is engaged in the retaining groove, which guides the linear movement of the slide. The plastic retaining plate limits the linear movement of the ball bearing plate forward.

[0014] The movable groove rail has two square stamping holes on the rear side of the first boss. The two outer sides of the stamping holes form an upward third bend, which is used to limit the backward linear movement of the ball groove plate.

[0015] Furthermore, the front end of the bottom wall of the chute is provided with a fourth bent edge that bends upward, and a second elastic plastic sleeve is fitted on the fourth bent edge for limiting the linear backward movement of the chute; the rear end of the bottom wall of the chute is provided with a trapezoidal opening groove, which engages with the first elastic plastic sleeve for limiting the linear backward movement of the chute.

[0016] Furthermore, the first boss is provided with a plurality of first rectangular through slots, and the second boss is provided with a plurality of second rectangular through slots.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. By setting a U-shaped mounting bracket, this utility model changes the bottom mounting method of the keyboard tray to a left and right side mounting method, so that the keyboard tray will not tilt downward when it is pulled out for work, thus improving stability;

[0019] 2. This utility model can be directly attached to the front of the desktop board by the slot of the U-shaped mounting bracket. It can be installed while standing without having to crawl under the desktop board. It is very convenient to install and disassemble, and it is highly efficient when converting an ordinary office desk into a computer desk.

[0020] 3. The U-shaped mounting bracket of this utility model can be integrally formed by bending a single steel plate, which is simple in processing and low in cost. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the structure of an embodiment of the present utility model;

[0022] Figure 2 is a schematic diagram of the connection between the push-pull device and the U-shaped mounting bracket in an embodiment of this utility model.

[0023] Figure 3 is a schematic diagram of the other side of the connection between the push-pull device and the U-shaped mounting bracket in an embodiment of this utility model;

[0024] Figure 4 is a schematic diagram of the cross-sectional structure of the push-pull device according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the U-shaped mounting bracket structure according to an embodiment of the present utility model;

[0026] Figure 6 is a schematic diagram of the fixed groove rail structure according to an embodiment of the present utility model;

[0027] Figure 7 is a schematic diagram of the ball bearing strip structure according to an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of the movable groove track structure of an embodiment of this utility model;

[0029] Figure 9 is a schematic diagram of the plastic card slot plate structure of an embodiment of the present invention.

[0030] Figure 10 is a schematic diagram of the ball groove plate structure according to an embodiment of the present utility model;

[0031] Figure 11 is a schematic diagram of the slide structure of an embodiment of this utility model.

[0032] In the diagram: 1. Computer desk; 2. Keyboard tray; 3. Push-pull mechanism; 31. Fixed rail; 311. First arc-shaped groove; 312. Opening groove; 313. First bent edge; 314. Second bent edge; 32. Ball bearing strip; 321. Steel ball; 33. Movable rail; 331. Second arc-shaped groove; 332. Third arc-shaped groove; 333. First boss; 334. Third bent edge; 335. First rectangular through groove; 34. Ball bearing groove plate; 341. Steel ball. 342. Second boss; 343. Second rectangular through groove; 35. Slide groove; 351. Fourth arc-shaped groove; 352. Fourth bent edge; 353. Trapezoidal opening groove; 36. First elastic plastic sleeve; 37. Plastic slot plate; 371. Outer arc surface; 372. Flange; 373. Slot; 38. Second elastic plastic sleeve; 4. U-shaped mounting bracket; 41. Fixing plate; 42. U-shaped groove plate; 43. Clamping screw; 44. Pressure head; 45. Plum blossom handwheel. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] As shown in Figures 1 to 11, this embodiment of the utility model includes a computer desk 1 and a keyboard tray 2 located below the computer desk 1 and forming a linearly movable back-and-forth motion with the computer desk 1. It also includes a push-pull device 3 and a U-shaped mounting bracket 4. There are two push-pull devices 3 and two U-shaped mounting brackets 4, which are respectively located on the left and right sides of the keyboard tray 2. The push-pull device 3 includes a slide rail assembly and a slide groove 35. The slide rail assembly is fixedly connected to the panel of the computer desk 1 through the U-shaped mounting bracket 4. The bottom wall of the slide groove 35 is fixedly connected to the left and right sides of the keyboard tray 2. The opening of the slide groove 35 is arranged facing the opening of the slide rail assembly and is inserted into the opening of the slide rail assembly, forming a linearly movable back-and-forth connection with the slide rail assembly. This allows the computer keyboard placed in the keyboard tray 2 to be pulled out for use at any time, or to be pushed under the computer desktop to be hidden at any time, so as to save workspace.

[0035] As shown in Figure 5, the U-shaped mounting bracket 4 includes a fixing plate 41, a U-shaped groove plate 42, and a clamping screw 43. The fixing plate 41 is placed vertically in the longitudinal direction. One side of the fixing plate 41 is fixedly connected to the bottom surface of the slide rail assembly. The U-shaped groove plate 42 is fixedly connected to the upper front side of the fixing plate 41 away from the slide rail assembly. The groove of the U-shaped groove plate 42 is engaged with the front side of the computer desk panel 1. The clamping screw 43 passes through the lower side wall of the U-shaped groove plate 42 and is threadedly connected to the lower side wall. The upper end of the clamping screw 43 is provided with a pressure head 44, and the lower end is provided with a pendulum handwheel 45. Rotating the pendulum handwheel 45 can clamp and fix the desktop panel between the upper surface of the pressure head 44 and the upper side wall of the U-shaped groove plate 42.

[0036] Furthermore, the U-shaped channel plate 42 is integrally formed by sheet metal bending of the upper side of the fixing plate 41, and is made of metal steel.

[0037] Furthermore, as shown in Figures 2, 3, and 4, the slide rail assembly includes a fixed groove rail 31, a ball bearing strip 32, a movable groove rail 33, and a ball bearing groove plate 34. The grooves of the fixed groove rail 31, the movable groove rail 33, and the ball bearing groove plate 34 have the same groove direction and are sequentially nested together. The movable groove rail 33 is fitted inside the fixed groove rail 31. The inner side wall of the fixed groove rail 31 has a through first arc-shaped groove 311 in the middle. The outer side wall of the movable groove rail 33 has a second arc-shaped groove 331 at a position corresponding to the first arc-shaped groove 311. The ball bearing strip 32 is embedded with three evenly distributed steel balls 321. The ball bearing strip 32 is inserted between the inner side wall of the fixed groove rail 31 and the outer side wall of the movable groove rail 33. The two sides of the steel balls 321 are tangent to the first arc-shaped groove 311 and the second arc-shaped groove 331, respectively, so that the movable groove rail 33 moves smoothly back and forth in a straight line within the fixed groove rail 31, reducing friction.

[0038] The ball groove plate 34 is fitted inside the movable groove rail 33. Six evenly distributed steel balls 341 are embedded on the left and right side walls of the ball groove plate 34. The upper end of the inner side wall of the movable groove rail 33 is provided with a through third arc-shaped groove 332, and the lower end of the outer side wall of the slide 35 is provided with a through fourth arc-shaped groove 351. The third arc-shaped groove 332 and the fourth arc-shaped groove 351 are tangent to the left and right sides of the steel balls 341, respectively, so that the slide 35 moves smoothly back and forth in a straight line within the movable groove rail 33, reducing friction.

[0039] Furthermore, as shown in Figures 8 and 10, the inner bottom wall of the movable groove 33 is provided with a first protrusion 333 that is formed by upward stamping and extends through the front and back, and the inner bottom wall of the ball groove plate 34 is provided with a second protrusion 342 that is formed by upward stamping and extends through the front and back. The second protrusion 342 is sleeved with the first protrusion 333, which guides the linear movement of the ball groove plate 34 in the movable groove 33.

[0040] Furthermore, as shown in Figure 6, the bottom wall of the rear end of the fixed groove rail 31 is provided with an opening groove 312, and the front side of the opening groove 312 is provided with an upward first bending edge 313. A first elastic plastic sleeve 36 is fitted on the first bending edge 313 for limiting the backward linear movement of the movable groove rail 33.

[0041] Two rectangular grooves are provided on the left and right sides of the bottom wall of the front end of the fixed groove rail 31. The side of the rectangular groove closest to the corresponding side wall is provided with a second bent edge 314 that bends upward. The second bent edge 314 is used to limit the forward linear movement of the ball strip 32 and also to limit the forward linear movement of the movable groove rail 33 within the fixed groove rail 31, thereby limiting the length of the movable groove rail 311 that can extend out of the fixed groove rail. 2 / 3 of the length of the movable groove rail 311 ≤ the length that can extend out ≤ 1 / 2 of the length of the movable groove rail 311.

[0042] Furthermore, as shown in Figure 9, a plastic retaining plate 37 is provided at the front end of the movable track 33. The upper ends of the left and right side walls of the plastic retaining plate 37 are provided with outer arc surfaces 371 that cooperate with and engage with the third arc groove 332 at the upper end of the movable track 33. An upwardly extending flange 372 is provided on the inner bottom surface of one side. A retaining groove 373 is formed between the flange 372 and the corresponding side wall. The corresponding side wall of the slide 35 is engaged in the retaining groove 373, which guides the linear movement of the slide 35. The plastic retaining plate 37 limits the linear movement of the ball bearing plate 34 forward.

[0043] As shown in Figure 8, the first boss 333 of the movable groove rail 33 is provided with two square stamping holes on the rear side. The two outer sides of the stamping holes form an upward third bending edge 334, which is used to limit the backward linear movement of the ball groove plate 34.

[0044] Furthermore, as shown in Figure 11, the front end of the bottom wall of the slide 35 is provided with an upwardly bent fourth bend edge 352, and a second elastic plastic sleeve 38 is fitted on the fourth bend edge 352 for limiting the linear backward movement of the slide 35; the rear end of the bottom wall of the slide 35 is provided with a trapezoidal opening groove 353, which is engaged with the first elastic plastic sleeve 36 and can be used to limit the linear backward movement of the slide 35.

[0045] Furthermore, as shown in Figures 8 and 10, the first boss 333 is provided with a plurality of first rectangular through slots 335, and the second boss 342 is provided with a plurality of second rectangular through slots 343.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A computer keyboard tray push-pull device, comprising a computer desk and a keyboard tray disposed under the computer desk and forming a linearly movable back-and-forth motion with respect to the computer desk, characterized in that: It also includes a push-pull device and a U-shaped mounting bracket. Two of each device are provided, located on the left and right sides of the keyboard tray respectively. The push-pull device includes a slide rail assembly and a slide groove. The slide rail assembly is fixedly connected to the computer desktop via the U-shaped mounting bracket. The bottom wall of the slide groove is fixedly connected to the left and right sides of the keyboard tray. The slide groove is inserted into the slide rail assembly, forming a linearly movable connection that allows the keyboard to be pulled out and used at any time, or pushed back under the computer desktop for easy concealment. The U-shaped mounting bracket includes a fixing plate, a U-shaped groove plate, and a clamping screw. The fixing plate is placed vertically, and one side of the fixing plate is fixedly connected to the bottom surface of the slide rail assembly. The U-shaped groove plate is fixedly connected to the upper front side of the fixing plate away from the slide rail assembly. The groove of the U-shaped groove plate engages with the front side of the computer desktop panel. The clamping screw passes through the lower side wall of the U-shaped groove plate and is threaded to the lower side wall. The upper end of the clamping screw is provided with a pressure head, and the lower end is provided with a pendulum handwheel. Rotating the pendulum handwheel can clamp and fix the desktop panel by the upper surface of the pressure head against the upper side wall of the U-shaped groove plate.

2. The computer keyboard tray push-pull device according to claim 1, characterized in that: The U-shaped channel plate is formed by bending the upper side of the fixed plate into one piece, and is made of metal steel.

3. The computer keyboard tray push-pull device according to claim 1, characterized in that: The slide rail assembly includes a fixed groove rail, a ball bearing strip, a movable groove rail, and a ball bearing groove plate. The grooves of the fixed groove rail, the movable groove rail, and the ball bearing groove plate are aligned. The movable groove rail is fitted inside the fixed groove rail. A first arc-shaped groove is provided in the middle of the inner sidewall of the fixed groove rail. A second arc-shaped groove is provided on the outer sidewall of the movable groove rail at a position corresponding to the first arc-shaped groove. Multiple evenly distributed steel balls are embedded in the ball bearing strip. The ball bearing strip is inserted between the inner sidewall of the fixed groove rail and the outer sidewall of the movable groove rail. The two sides of the steel balls are respectively aligned with the first arc-shaped groove. The first and second arc-shaped grooves are tangent to each other, allowing the movable groove to move smoothly back and forth in a straight line within the fixed groove, thus reducing friction. The ball bearing groove plate is fitted inside the movable groove, and several evenly distributed steel balls are embedded on the left and right side walls of the ball bearing groove plate. The upper end of the inner side wall of the movable groove has a through third arc-shaped groove, and the lower end of the outer side wall of the slide groove has a through fourth arc-shaped groove. The third and fourth arc-shaped grooves are tangent to the left and right sides of the steel balls, respectively, allowing the slide groove to move smoothly back and forth in a straight line within the movable groove, thus reducing friction.

4. A computer keyboard tray push-pull device according to claim 3, characterized in that: The inner bottom wall of the movable groove is provided with a first protrusion that is formed by upward stamping and extends through the front and back. The inner bottom wall of the ball groove is provided with a second protrusion that is formed by upward stamping and extends through the front and back. The second protrusion is sleeved with the first protrusion, which guides the linear movement of the ball groove in the movable groove.

5. A computer keyboard tray push-pull device according to claim 3, characterized in that: The fixed groove has an opening slot on the bottom wall of its rear end, and a first upward bend on the front side of the opening slot. A first elastic plastic sleeve is fitted on the first bend to limit the linear backward movement of the movable groove. The fixed groove has two rectangular slots on the left and right sides of its front end, and a second upward bend on the side of the rectangular slot closest to the corresponding side wall. The second bend limits the linear forward movement of the ball bearing strip and also limits the linear forward movement of the movable groove within the fixed groove.

6. A computer keyboard tray push-pull device according to claim 3, characterized in that: The movable track has a plastic retaining plate at its front end. The upper ends of the left and right side walls of the plastic retaining plate have outer arc surfaces that engage with the third arc-shaped groove at the upper end of the movable track. An upwardly extending flange is provided on the inner bottom surface of one side. The flange and the corresponding side wall form a retaining groove. The corresponding side wall of the slide is engaged in the retaining groove, which guides the linear movement of the slide. The plastic retaining plate limits the linear movement of the ball bearing plate forward. The movable track has two square stamping holes on the rear side of the first boss. The two outer sides of the stamping holes form an upward third bend, which limits the linear movement of the ball bearing plate backward.

7. A computer keyboard tray push-pull device according to claim 5, characterized in that: The front end of the bottom wall of the chute is provided with a fourth bent edge that bends upward, and a second elastic plastic sleeve is fitted on the fourth bent edge for limiting the straight backward movement of the chute; the rear end of the bottom wall of the chute is provided with a trapezoidal opening groove, which engages with the first elastic plastic sleeve for limiting the straight backward movement of the chute.

8. A computer keyboard tray push-pull device according to claim 4, characterized in that: The first boss is provided with a plurality of first rectangular through slots, and the second boss is provided with a plurality of second rectangular through slots.

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